[asan] Tweak gen_dynamic_list.py to work with both Py2 and Py3.
[asan] Tweak gen_dynamic_list.py to work with both Py2 and Py3.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@249051 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt